Ca(OH)_2黏土混合物的固磷固硫作用  

Phosphorus-fixation and sulfur-fixation by using Ca(OH)_2/clays sorbent

作　　者：王磊[1] 王重华[1] 宁平[1] 蒋明[1] 覃扬颂[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,云南昆明650500

出　　处：《浙江大学学报（工学版）》2013年第5期874-882,共9页Journal of Zhejiang University：Engineering Science

基　　金：国家"863"高技术计划资助项目(2008AA062602);云南省自然科学基金资助项目(14051184);昆明理工大学分析测试基金资助项目(2009-061)

摘　　要：为探索安全利用黄磷尾气所含热能的方法,防止气体产物对燃烧设备的腐蚀.采用小型流化床实验装置预混燃烧黄磷尾气.在温度为900～980℃的范围内,考察Ca(OH)2吸收剂中添加黏土对P2O5和SO2去除率的影响.使用X射线衍射(XRD)、扫描电镜(SEM)和X射线能谱(EDS)对吸收剂进行物相表征及微区元素分析;运用FactSage6.2热力学软件分析添加黏土吸收剂烧结的原因.结果表明,添加黏土能够促进Ca(OH)2的分解,提高SO2的去除率和吸收剂利用率.P2O5的去除率由温度决定,温度升高有利于P2O5的去除.CaO、SiO2和Al2O3反应形成的玻璃态物质,会阻止颗粒间的相互传热,导致添加黏土吸收剂的烧结.In order to explore method to safe utilization heat of yellow phosphorus tail gas, and prevent combustion equipment corroded by yellow phosphorus tail gas combustion products. The addition of clays effect on retention of P2O5 and SO2 in Ca（OH）E was examined at 900-980℃, though premixed combustion of yellow phosphorus tail gas in small fluidized bed experimental device. XRD, SEM and EDS techniques were used to analyze and characterize sorbent. The computer software package FactSage6.2 was used to analyze Ca（OH）2/clays sorbent sintered reasons. The results show that the addition of clays promote Ca（OH）2 decomposition, improve SO2 removal efficiency and sorbent utilization. P2O5 removal efficieneies increase with temperature. CaO.SiO2 and Al2O3 reaction to form a glassy substance inhibit heat release, finally leading to Ca（OH）2/clays sorbent sintered.

关 键 词：黄磷尾气 预混燃烧 固磷 固硫 

分 类 号：X511[环境科学与工程—环境工程]